# Consultation on the robotic arm **URL:** \ **Category:** General Discussion\ **Tags:** ardusub, pymavlink\ **Created:** [October 18, 2020, 1:21am UTC](https://discuss.bluerobotics.com/t/consultation-on-the-robotic-arm/8385 "2020-10-18T01:21:17Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![PBC](https://avatars.discourse-cdn.com/v4/letter/p/4491bb/32.png) [@PBC](https://discuss.bluerobotics.com/u/PBC)\ **Post date:** [October 18, 2020, 1:21am UTC](https://discuss.bluerobotics.com/t/consultation-on-the-robotic-arm/8385/1 "2020-10-18T01:21:17Z")
Want to know how the manipulator with the ROV works and how it opens and closes ---
**Author:** ![octopus](https://avatars.discourse-cdn.com/v4/letter/o/ebca7d/32.png) [@octopus](https://discuss.bluerobotics.com/u/octopus)\ **Post date:** [October 27, 2020, 2:59pm UTC](https://discuss.bluerobotics.com/t/consultation-on-the-robotic-arm/8385/2 "2020-10-27T14:59:39Z")
你指的是哪种机械臂？ ---
**Author:** ![PBC](https://avatars.discourse-cdn.com/v4/letter/p/4491bb/32.png) [@PBC](https://discuss.bluerobotics.com/u/PBC)\ **Post date:** [October 28, 2020, 12:48am UTC](https://discuss.bluerobotics.com/t/consultation-on-the-robotic-arm/8385/3 "2020-10-28T00:48:01Z")
单自由度机械臂 ---
**Author:** ![EliotBR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/eliotbr/32/6937_2.png) [@EliotBR](https://discuss.bluerobotics.com/u/EliotBR)\ **Post date:** [October 28, 2020, 4:54am UTC](https://discuss.bluerobotics.com/t/consultation-on-the-robotic-arm/8385/4 "2020-10-28T04:54:09Z")
If you’re talking about the [Newton Subsea Gripper](https://bluerobotics.com/store/rov/bluerov2-accessories/newton-gripper-asm-r1-rp/) the video on the page explains how it works, and the [Technical Details](https://bluerobotics.com/store/rov/bluerov2-accessories/newton-gripper-asm-r1-rp/#tab-technical-details) and [Learn](https://bluerobotics.com/store/rov/bluerov2-accessories/newton-gripper-asm-r1-rp/#tab-learn) sections at the bottom describe the extent of motion and the required PWM signal to open/close the gripper. ---
**Author:** ![PBC](https://avatars.discourse-cdn.com/v4/letter/p/4491bb/32.png) [@PBC](https://discuss.bluerobotics.com/u/PBC)\ **Post date:** [October 28, 2020, 5:18am UTC](https://discuss.bluerobotics.com/t/consultation-on-the-robotic-arm/8385/5 "2020-10-28T05:18:23Z")
请问夹持器是什么驱动它张开闭合的，直流电机吗？ ---
**Author:** ![EliotBR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/eliotbr/32/6937_2.png) [@EliotBR](https://discuss.bluerobotics.com/u/EliotBR)\ **Post date:** [October 28, 2020, 5:55am UTC](https://discuss.bluerobotics.com/t/consultation-on-the-robotic-arm/8385/6 "2020-10-28T05:55:05Z")
As it says in the Product Description section, > The jaws are driven by a linear actuator that uses a geared brushed motor and lead screw. The same section also specifies that > The motor is controlled by a purpose-built brushed motor controller that accepts a standard servo-style PWM signal so that the gripper can be controlled just like our thrusters and lights. So basically they use custom electronics to take in a PWM signal and actuate a brushed DC motor, which turns some gears (likely to improve the efficiency and increase the output torque), which turn a lead-screw, and the gripper jaws are pushed open/pulled closed by the linear motion of a carriage on the lead-screw. Something like this: ![image](https://us1.discourse-cdn.com/flex019/uploads/bluerobotics/original/2X/2/24e56c8aa56075d32d60a351be8d6036d1dddccf.jpeg) ---
**Author:** ![PBC](https://avatars.discourse-cdn.com/v4/letter/p/4491bb/32.png) [@PBC](https://discuss.bluerobotics.com/u/PBC)\ **Post date:** [October 29, 2020, 3:38am UTC](https://discuss.bluerobotics.com/t/consultation-on-the-robotic-arm/8385/7 "2020-10-29T03:38:41Z")
非常感谢!!! ---
**Author:** ![EliotBR](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/eliotbr/32/6937_2.png) [@EliotBR](https://discuss.bluerobotics.com/u/EliotBR)\ **Post date:** [October 29, 2020, 7:42am UTC](https://discuss.bluerobotics.com/t/consultation-on-the-robotic-arm/8385/8 "2020-10-29T07:42:26Z")
No worries, glad I could help 🙂 As a note, not everyone is happy using google translate to read posts, so it might be worth trying to post questions and responses in English on the forum so that your posts are more accessible to the general community. Greater accessibility also means you’re more likely to get helpful responses from people, and it’s easier for them to learn from your posts 🙂 ---
**Author:** ![PBC](https://avatars.discourse-cdn.com/v4/letter/p/4491bb/32.png) [@PBC](https://discuss.bluerobotics.com/u/PBC)\ **Post date:** [October 29, 2020, 8:19am UTC](https://discuss.bluerobotics.com/t/consultation-on-the-robotic-arm/8385/9 "2020-10-29T08:19:28Z")
Thank you very much for your advice and thank you again for answering my question！ 🥰 ---
**Author:** ![Bettye6](https://avatars.discourse-cdn.com/v4/letter/b/8dc957/32.png) [@Bettye6](https://discuss.bluerobotics.com/u/Bettye6)\ **Post date:** [November 8, 2020, 12:28pm UTC](https://discuss.bluerobotics.com/t/consultation-on-the-robotic-arm/8385/10 "2020-11-08T12:28:43Z")
How’s it going? Any results yet? ---
**Author:** ![PBC](https://avatars.discourse-cdn.com/v4/letter/p/4491bb/32.png) [@PBC](https://discuss.bluerobotics.com/u/PBC)\ **Post date:** [November 8, 2020, 12:43pm UTC](https://discuss.bluerobotics.com/t/consultation-on-the-robotic-arm/8385/11 "2020-11-08T12:43:00Z")
Yes, we have the result. Thank you for your attention